Objective To analyze the effect of dental restoration technology on restoration effect and pain intensity in patients with early-stage cracked tooth. Methods A total of 88 patients with early-stage cracked tooth admitted to the Department of Stomatology, Suzhou Kowloon Hospital, Shanghai Jiao Tong University School of Medicine from August 2023 to June 2024 were selected. According to the random number table method, they were divided into the control group and the experimental group, with 44 patients in each group. The control group was treated with conventional occlusal adjustment and fflling, and the experimental group was treated with dental restoration technology. The restoration effect, pain intensity, comfort level and recurrence rate were compared between the two groups. Results The total effective rate of the experimental group (86.36%) was higher than that of the control group (63.64%), and the difference was statistically signiffcant (P<0.05). The VAS score of the experimental group was lower than that of the control group, while the GCQ score was higher than that of the control group, and the differences were statistically signiffcant (P<0.05). The recurrence rate of the experimental group was 2.27%, which was lower than 13.64% of the control group, and the difference was statistically signiffcant (P<0.05). Conclusion Dental restoration technology achieves an ideal restoration effect in the treatment of early-stage cracked tooth. It can effectively alleviate pain intensity, reduce the recurrence rate, improve patients' comfort level, and is worthy of clinical application.